Another way to retain email addresses, not to mention addresses and
phone numbers, is to use a "personal data assistant", aka Palm
Pilot. I used to use a Day Timer and it was woefully inadequate (you
actually have to pick it up and look at it). Now I use my PDA,
synchronize it with my Outlook program, and I have my schedule,
address book, notepad, etc. at my fingertips. The nice thing is that
should my computer crash, all I have to do is reinstall Outlook and
my PDA programs, synchronize, and everything I need is restored.